64821349 has 8 divisors (see below), whose sum is σ = 65808288. Its totient is φ = 63841680.

The previous prime is 64821343. The next prime is 64821359. The reversal of 64821349 is 94312846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64821349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64821343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17694 + ... + 21040.

It is an arithmetic number, because the mean of its divisors is an integer number (8226036).

Almost surely, 2^64821349 is an apocalyptic number.

It is an amenable number.

64821349 is a deficient number, since it is larger than the sum of its proper divisors (986939).

64821349 is a wasteful number, since it uses less digits than its factorization.

64821349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its digits is 41472, while the sum is 37.

The square root of 64821349 is about 8051.1706602208. The cubic root of 64821349 is about 401.7038754654.

The spelling of 64821349 in words is "sixty-four million, eight hundred twenty-one thousand, three hundred forty-nine".